Plow.



C. S JOHNSTON.

PLOW. I

APPLICATION HLED MAY 14. 1915.

1,206,224. Patented Nov. 28,1916.

Witnesses Inventor P by 78mm I '1- Attorneysv CLARENCE s. JOHNSTON, orGLENDIVE, MONTANA.

PLOW.

Specification of Letters Patent.

Patented Nov. 28, 1916.

Application filed May 14, 1915. Serial No. 28,135.

To all whom it may concern Be it known that I, CLARENCE S. JOHN- STON, acitizen of the United States, residing at Glendive, in the county ofDawson and State of Montana, have invented a new and useful Plow, ofwhich the following is a specification.

This invention relates to plows, one of its objects being to provide aplow share having a removable point anda removable cutting portion alongthe front of the share.

A further object is to provide a structure of this character the pointof which constitutes a means for holding the cutting blade to the share.

Another object is to provide a plow the detachable parts of which willnot become accidentally detached when in use.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings :Figure 1 is a plan view of a plow share embodying thepresent improvements, a portion thereof being broken away. Fig. 2 is abottom plan view of a portion of the plow share and showing theremovable point locked in position. Fig. 3 is a perspective view of saidportion of the plow share, the landside being shown in section and thepoint removed. Fig. 4: is an inverted perspective view of the point.Fig. 5 is a perspective view of the cutting blade.

Referring to the figures by characters of reference 1 designates theplow share provided with a longitudinal groove 2 in the front oradvancing edge thereof, there being a landside 3 below one side portionof the share. This landside extends under and throughout the length of awing 4 provided at the front of the landside portion of the share, thiswing being extended laterally beyond the grooved edge of the share, as

shown at 5 and being thinner than the share so that an obliquelydisposed shoulder 6 is provided along the rear portion of the wing.Formed in the bottom of the share 1 close tongue 11 is designed to fitsnugly within the groove 7 and is tapered toward its rear end tocorrespond with the contour of the groove. Tongue 11 extends rearwardlyfrom the point 12 of the plow and this point is adapted to abut againstthe forward edge of the wing 1. An apron 13 extends rearwardly from thepoint and overhangs and is spaced from a portion of the tongue 11,

this apron being designed, when the tongue 11 is seated in groove 7, tofit upon the wing 4 and to abut against the shoulder 6. When the pointis properly positioned relative to the share 1, the nose 9 on lever 8 isseated in the notch 10 so as to prevent the tongue from being pulledforwardly out of groove 7. Any desired means may be employed for holdingthe lever 8 against accidental movement. For example, a small stud orprojection 1d may be formed upon the bottom face ,of the share and thelever 8 caused to ride thereover while moving to locking position;

7 Extending across that end of groove 2 remotefrom the point is aholding pin'15 and this pin is detachably engaged by the slotted end 16of a rib 17 which is formed longitudinally along the inner or rear edgeof an elongated blade 18. Rib 17 is designed to fit snugly within thegroove 2 and extends throughout the length thereof and the blade 18 isadapted to be engaged at one end by the apron 13, as shown in Fig. 1,this apron cooperating with the pin 15 to prevent the blade 18 frombecoming displaced relative to the share 1.

It will be obvious that should the point 12 become worn or broken, a newone can be substituted readily therefor, and the same is likewise trueof the blade 18.

What is claimed 1. The combination with a plow share and a landsidetherebelow, and a wing extending forwardly from the share, said landsidebeing extended under and throughout the length of the wing, the upperface of the wing being below the surface of the upper face of the shareto form an obliquely dis-' posed shoulder, there being a dovetail groovein the bottom face of the share and close to the landside, said groovediminishing in depth toward the rear end thereof, of a point adapted toabut against the forward edge of the wing, an apron extending rearwardlyfrom the point and adapted to lap the wing and to abut against theshoulder, a tongue extending rearwardly from the point and insertiblelongitudinally into the dovetail groove, and means upon the bottom ofthe share and cooperating with the tongue for holding said tongue withinthe groove.

2. The combination with a plow share having a forwardly extending Wingadjacent the landside thereof, the upper face of the wing being disposedbelow the corresponding face of the plow share to form an obliquelydisposed shoulder, there being a longitudinal groove in the front edgeof the plow share, of an elongated blade fitted against the front edgeof the plow share, a rib upon the blade and extending Within andlongitudinally of the groove in the share, means extending through theshare and rib for securing one end of said rib in the groove, a pointbearing against the wing on the share, an apron thereon lapping the wingand abutting against the shoulder and the adjacent end of the blade,said apron constituting means for holding the adjacent end of the bladein engagement with the share, and means for detachably securing thepoint to the share.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in;

in the presence of two witnesses.

CLARENCE S. JOHNSTON. Witnesses J. M. ONEIL, M. J. HUeHns.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

